CN207318822U - A kind of magnified image device of mixed reality - Google Patents
A kind of magnified image device of mixed reality Download PDFInfo
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- CN207318822U CN207318822U CN201721007545.0U CN201721007545U CN207318822U CN 207318822 U CN207318822 U CN 207318822U CN 201721007545 U CN201721007545 U CN 201721007545U CN 207318822 U CN207318822 U CN 207318822U
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Abstract
The utility model discloses a kind of magnified image device of mixed reality,The magnified image device includes external camera,Left eye microscope group and right eye microscope group,The external camera is used for the image for obtaining screen,The left eye microscope group and the right eye microscope group include the first speculum group,Second speculum group,First speculum group is set along the optical axis of its own,And first speculum group is used to receive the incident light that image is sent out,Second speculum group is set along the optical axis of its own,Second speculum group is used to receive the reflected light through first speculum group reflection and carries out secondary reflection,The image for the screen that the incident light obtain with the external camera after secondary reflection by second speculum group is superimposed,First speculum group is sequentially arranged with second speculum group along the eyes direction from screen to beholder.The utility model realizes the effect of mixed reality, improves the real experiences of user.
Description
Technical field
It the utility model is related to video image display technology field, and in particular to a kind of magnified image dress of mixed reality.
Background technology
With people material life is pursued it is higher and higher so that people are to various products such as consumables, electronic equipments
Usage experience require it is higher and higher.For example, using mobile phone or tablet computer when to watch video, it is desirable to output regards
Frequency is enough big and clear.At the same time, with the quickening pace of modern life, for especially for working clan, using television set etc. come
The probability of viewing video is fewer and fewer, some small-sized portability equipment such as mobile phone meet the demand of the types of populations on the contrary.
At present, user, which watches mobile video image, mainly two ways：A kind of mode is human eye direct viewing Mobile phone screen
Curtain, but need both hands to help, and viewing angle is smaller, influences viewing effect；Another kind is virtual for image left-right format 3D auxiliary
Real device, it is that same object is individually imaged respectively by the eyes of people, after lens enlarged drawing obtained by right and left eyes
Image has minute differences (parallax), then is obtained through brain system processing.At present, but they have the disadvantage that：Need by
The optical aberration such as lens group enlarged drawing, caused distortion, aberration can cause that the 3D experience senses of user are strong or dizzy, eye pain
Phenomena such as even vomitting, user's real experiences effect is poor.
Utility model content
In view of the deficiencies of the prior art, the utility model provides a kind of magnified image device of mixed reality, to solve
It is certainly existing due to the use of 3D experience senses caused by lens enlarged drawing are not strong or dizzy, eye aches even vomiting etc. in the prior art
As.
For this reason, embodiment according to the present utility model, including external camera, left eye microscope group and right eye microscope group, it is described outer
The image that camera is used to obtain screen is put, the left eye microscope group and the right eye microscope group include：
First speculum group, first speculum group are set along the optical axis of its own, and first speculum group is used
In the incident light that reception image is sent out；
Second speculum group, second speculum group are set along the optical axis of its own, and second speculum group is in
On the reflected light path of first speculum group, second speculum group is used to receive to reflect through first speculum group
Reflected light and carry out secondary reflection, the incident light external take the photograph with described after secondary reflection by second speculum group
As the image superposition for the screen that head obtains；
Wherein, first speculum group and second speculum group along the eyes direction from screen to beholder successively
Arrangement.
As the further alternative of the magnified image device, the ATR Optical of second speculum group faces
To the eyes.
As the further alternative of the magnified image device, optical axis and the eyes of second speculum group
Oculopupillary optical axis be in same plane.
As the further alternative of the magnified image device, first speculum group and the optical axis of the screen
Extending direction it is inconsistent, first speculum group and the extending direction of the optical axis of second speculum group are inconsistent, institute
State the second speculum group and the extending direction of the oculopupillary optical axis of the eyes is inconsistent.
As the further alternative of the magnified image device, the first reflection group includes multiple first speculums
Piece, second speculum group include multiple second reflecting optics.
As the further alternative of the magnified image device, the focal power of first speculum group is selected from just
Number, negative or one or more of zero, the focal power of second speculum group is selected from positive number and/or negative.
As the further alternative of the magnified image device, first speculum group and second speculum
The focal power of group meets relational expression：
-0.55<(Φ1+Φ2-(Φ1*Φ2)*d12)<0.55；
Wherein, Φ 1 and Φ 2 is respectively the focal power of first speculum group and second speculum group, and d12 is institute
State the equivalent gap between the first speculum group and second speculum group.
As the further alternative of the magnified image device, the surface configuration of first reflecting optics, which is selected from, puts down
Face, sphere or it is aspherical in one kind, the surface configurations of second reflecting optics selected from sphere or it is aspherical in one kind.
As the further alternative of the magnified image device, first reflecting optics and second speculum
The aspherical surface configuration of piece meets relational expression：
Wherein, z is eyeglass rise, and c is lens curvature, and k is circular cone coefficient, and y is eyeglass bore, and a1~a8 is aspherical height
Secondary term coefficient.
As the further alternative of the magnified image device, first reflecting optics and second speculum
Piece is made by abbe number more than 50 low dispersion optical material, first reflecting optics and second reflecting optics
Surface is coated with total reflection film.
The beneficial effects of the utility model：
According to the magnified image device in above example, since the eyes direction from screen to beholder has been sequentially arranged
First speculum group and the second speculum group, image is sent out the anti-of incident light by the first speculum group and the second speculum group
Penetrating realizes the amplification effect of image, then the image of the screen obtained with external camera is overlapped, and realizes mixed reality
Effect.And in above process and traditional lens are not used to be amplified, therefore broken away from a variety of of conventional lenses and lacked
Fall into, improve the real experiences effect of user.
Brief description of the drawings
, below will be to required use in embodiment in order to illustrate more clearly of the technical solution of the utility model embodiment
Attached drawing be briefly described, it will be appreciated that the following drawings illustrate only some embodiments of the utility model, therefore should not be by
Regard the restriction to scope as, for those of ordinary skill in the art, without creative efforts, may be used also
To obtain other relevant attached drawings according to these attached drawings.
Fig. 1 shows a kind of schematic diagram of the magnified image device of the mixed reality provided according to the embodiment of the present application.
Main element symbol description：
The first speculum groups of 100-；The second speculum groups of 200-；1000- screens；2000- eyes.
Embodiment
The embodiment of the utility model is described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning
Same or similar element is represented to same or similar label eventually or there is same or like element.Below by ginseng
The embodiment for examining attached drawing description is exemplary, and is only used for explaining the utility model, and it is not intended that to the utility model
Limitation.
In the description of the utility model, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width
Degree ", " thickness ", " on ", " under ", "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom ", " interior ", " outer ",
The orientation or position relationship of the instruction such as " clockwise ", " counterclockwise ", " axial direction ", " radial direction ", " circumferential direction " are based on shown in the drawings
Orientation or position relationship, are for only for ease of description the utility model and simplify description, rather than indicate or imply signified dress
Put or element there must be specific orientation, with specific azimuth configuration and operation, therefore it is not intended that to the utility model
Limitation.
In addition, term " first ", " second " are only used for description purpose, and it is not intended that instruction or hint relative importance
Or the implicit quantity for indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can be expressed or
Implicitly include one or more this feature.In the description of the utility model, " multiple " are meant that two or two
More than, unless otherwise specifically defined.
In the utility model, unless otherwise clearly defined and limited, term " installation ", " connected ", " connection ", " Gu
It is fixed " etc. term should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integrally；Can be
Mechanically connect or be electrically connected；It can be directly connected, can also be indirectly connected by intermediary, can be two
The interaction relationship of connection or two elements inside element.For the ordinary skill in the art, can basis
Concrete condition understands concrete meaning of the above-mentioned term in the utility model.
In the utility model, unless otherwise clearly defined and limited, fisrt feature is "above" or "below" second feature
Can be that the first and second features directly contact, or the first and second features pass through intermediary mediate contact.Moreover, first is special
Sign second feature " on ", " top " and " above " can be fisrt feature directly over second feature or oblique upper, or only
Represent that fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " can be with
Be fisrt feature immediately below second feature or obliquely downward, or be merely representative of fisrt feature level height and be less than second feature.
Embodiment
A kind of magnified image device of mixed reality is present embodiments provided, referring to Fig. 1, the magnified image device includes
External camera, left eye microscope group and right eye microscope group.
Wherein, external camera is used for the image for obtaining screen, and left eye microscope group includes the first speculum with right eye microscope group
100 and second speculum group 200 of group.
First speculum group 100 is set along the optical axis of its own, and the first speculum group 100 is used to receive what image was sent out
Incident light.Second speculum group 200 is set along the optical axis of its own, and the second speculum group 200 is in the first speculum group 100
On reflected light path, the second speculum group 200 is used to receive the reflected light through the reflection of the first speculum group 100 and carries out secondary counter
Penetrate, the image for the screen that incident light obtain with external camera after secondary reflection by the second speculum group is superimposed.
Wherein, the first speculum group 100 and the second speculum group 200 are along 2000 side of eyes from screen 1000 to beholder
To being sequentially arranged.
In this way, due to 2000 direction of eyes from screen 1000 to beholder be sequentially arranged the first speculum group 100 with
Second speculum group 200, the reflection that incident light is sent out image by the first speculum group 100 and the second speculum group 200 are real
The amplification effect of image is showed, then virtual reality is realized with being superimposed for right eye microscope group by left eye microscope group.At the same time, to shadow
As can also be overlapped after being amplified virtually with the image of the screen of external camera acquisition, mixed reality effect is realized.
In above process and traditional lens are not used to be amplified, having broken away from needs the optics such as software processing aberration, deformation
The step of aberration, the present apparatus uses even principle of reflection, therefore has broken away from many disadvantages of conventional lenses, improves the reality of user
Border experience effect.While in the above-mentioned reflection process to incident light and traditional lens are not used, therefore it is soft to have broken away from needs
Part carries out the step of mirror image processing, therefore the utility model also reduces work(on the basis of realizing image is amplified
Consumption and software processing difficulty.
The left eye microscope group and the composition of right eye microscope group of device for image in the utility model embodiment are simple, can be significantly
The cost input in production process is reduced, shortens the production cycle.
User can utilize the video image or double screen that this device for image can be after direct viewing such as mobile phone screen split screen
Full-size video image, add viewing effect.
It should be noted that the center line of light beam (light beam) or the symmetry axis of optical system are optical axis.Light beam turns around this axis
It is dynamic, there should not be the change of any optical characteristics.For example, when finding the optical axis of jewel, when light leads to from some special direction
When crossing heterogeneous body jewel, birefringent phenomenon does not occur.This particular orientation is exactly the optical axis of jewel.
In the utility model embodiment, by the first speculum group 100 and the second speculum group 200 along respective optical axis
The amplification quality of image can be improved to a certain extent by setting.Specifically, for the first speculum group 100, first is anti-
Microscope group 100 is penetrated when the incident light sent out image is launched, since the first speculum group 100 is set along the direction of its optical axis
Put, thus can cause incident light that the change of any optical characteristics will not occur, keep the intrinsic essence of incident light, prevent shadow
Picture goes bad.For the second speculum group 200, the second speculum group 200 is being received through the reflection of the first speculum group 100
During reflected light, similarly, since the second speculum group 200 is set along the direction of its optical axis, it can thus cause anti-through first
The change of any optical characteristics will not be occurred by penetrating when the reflected light that microscope group 100 reflects passes through the second speculum group 200, keep it solid
There is essence, when most entering the eyes of beholder through 200 secondary reflection of the second speculum group afterwards, image will not except after becoming larger
Any other change is produced, ensure that the effect of image, ensure that the user experience of user.
In the utility model embodiment, glasses, eyeshade or mask etc. can be made in magnified image device, and some are made
Type or the product only wrapped up by crust.At this time, when user puts on above-mentioned glasses, eyeshade or mask viewing mobile phone etc.
, it can be achieved that the amplification effect of image during screen.
In some embodiments, the ATR Optical face of the second speculum group 200 can be towards the eyes of beholder, this
Sample can further improve amplification effect of the magnified image device to image, further increase the visual experience of user.
In some embodiments, the light of the second speculum group 200 of magnified image device left eye microscope group and right eye microscope group
Axis is in same plane with the oculopupillary optical axis of corresponding eyes respectively.Two reflections in left eye microscope group and right eye microscope group
Eyeglass can be made separated two panels eyeglass and two panels eyeglass using two eyeglasses and made with double in an actual embodiment
The integrative lens of optical axis.So can be according to the actual use demand of different user, it is further provided the experience in user's use
Effect.
Further, the first speculum group 100 and the extending direction of the optical axis of screen are inconsistent, the first speculum group 100
It is inconsistent with the extending direction of the optical axis of the second speculum group 200, the second speculum group 200 and the oculopupillary light of eyes 2000
The extending direction of axis is inconsistent.
In this way, it on the one hand can ensure the stability of light propagation path come out from screen.Specifically, work as to go out from screen
The light come is in the reflection process by the first speculum group 100 and the second speculum group 200, due to the extension side of each optical axis
To inconsistent two-by-two, interference will not be produced between light, so as to ensure the quality of amplified image.On the other hand, by first
Speculum group 100, the second speculum group 200 are arranged to optical axis and screen 1000, eyes 2000 inconsistent mode two-by-two, can be with
The first speculum group 100 and the space occupied by the second speculum group 200 are reduced to a certain extent, so when by the amplification shadow
, can be with when foregoing glasses, the eyeshade product that either mask when some moulding or is only wrapped up by crust is made as device
So that the overall dimensions of the said goods diminish, to facilitate user to carry or use.
In the utility model embodiment, the first speculum group 100 includes multiple first reflecting optics, the second speculum
Group 200 includes multiple second reflecting optics.
Multiple first reflecting optics combine to form the first speculum group 100, are made by the reflection of multiple first reflecting optics
With can be overlapped to the incident light come out from screen, so that the intensity or bright of incident light can be improved to a certain extent
Degree, ensures the quality of the light Jing Guo the first speculum group 100；Similarly, multiple second reflecting optics combine to form the second reflection
Microscope group 200, can be further to the light from the first speculum group 100 out by the reflex of multiple second reflecting optics
It is overlapped, so that intensity is obtained after being come out from the second speculum group 200 for light or the further of brightness is strengthened, finally
Improve amplification effect of the whole magnified image device to image.
It is understood that in some embodiments, the first speculum group 100 can also be only by a reflecting optics
It is made, the second speculum group 200 can also only be made of a reflecting optics, and it is anti-so to reduce by first to a certain extent
The manufacture difficulty of 100 and second speculum group 200 of microscope group is penetrated, reduces the input of cost.
In the utility model embodiment, the focal power of the first speculum group in positive number, negative or zero one
A or multiple, the focal power of the second speculum group is selected from positive number and/or negative.
Thus, using above-mentioned first speculum group 100 and above-mentioned second speculum group 200 so that the first speculum group
100 and second speculum group 200 possess a variety of collocation modes, it is real to meet the needs of different use groups such as distant vision, myopia
The use that a set of magnified image device can meet various different user colonies is showed.
It is understood that when user for myopia when, it is clear that the first speculum group with positive light coke and with positive light
Second speculum group of focal power is combined with magnified image, and amplified image can be clearly watched for such user.Work as user
For long sight when, it is clear that the first speculum group with negative power is combined to amplify with the second speculum group with negative power
Image, amplified image can be clearly watched for such user.
Here, it is necessary to illustrate, due to needing to realize the amplification effect influenced, the second speculum group is unsuitable
Using zero focal power.
Further, in order to ensure the first speculum group can be combined correctly with the second speculum group, in some embodiment party
In formula, the focal power of the first speculum group and second speculum group meets relational expression：
-0.55<(Φ1+Φ2-(Φ1*Φ2)*d12)<0.55；
Wherein, Φ 1 and Φ 2 is respectively the focal power of first speculum group 100 and second speculum group 200,
Equivalent gaps of the d12 between first speculum group 100 and second speculum group 200.
It can be standardized according to the first reflecting optics that relation above formula produces and the second reflecting optics so that producing
During first reflecting optics and the second reflecting optics, production efficiency is improved, shortens the production cycle.
In the utility model embodiment, the surface configurations of the first reflecting optics selected from plane, sphere or it is aspherical in
One kind, the surface configurations of the second reflecting optics selected from sphere or it is aspherical in one kind.
It is appreciated that the first reflecting optics and the second reflecting optics is that the selection of surface configuration should be with hereinbefore light focus
The selection of degree is adapted.For example, plane corresponds to zero focal power, convex surface (sphere is aspherical) corresponding positive light coke or concave surface
(sphere is aspherical) corresponds to negative power.
When the surface configuration of the first reflecting optics and the second reflecting optics is chosen for plane or sphere, according to usual tool
The eyeglass for having such shape is manufactured.
It should be noted that when the first reflecting optics and the second reflecting optics selection it is aspherical when, the first reflecting optics with
The aspherical surface configuration of second reflecting optics can meet relational expression：
Wherein, z is eyeglass rise, and c is lens curvature, and k is circular cone coefficient, and y is eyeglass bore, and a1~a8 is aspherical height
Secondary term coefficient.
It can be standardized according to the first reflecting optics that relation above formula produces and the second reflecting optics so that producing
During first reflecting optics and the second reflecting optics, production efficiency is improved, shortens the production cycle.
In some embodiments, the first reflecting optics and the second reflecting optics are more than 50 low dispersion by abbe number
Optical material is made.
Further, the surface of the first reflecting optics and the second reflecting optics is coated with total reflection film.
In this way, sending out image the reflection of incident light with the second speculum group 200 by the first speculum group 100 realizes
Outside the amplification effect of image, simultaneously because being coated with full transmitting on the surface of the first speculum group 100 and the second speculum group 200
Film, so that during being amplified to influence, light can be reflected away all, reduced the loss of energy, carried
The high viewing effect of image.
In addition to the above, in some embodiments, the first speculum group 100 is set with 200 activity of the second speculum group
Put between screen and the eyes of beholder.
In this way, sending out image the reflection of incident light with the second speculum group 200 by the first speculum group 100 realizes
The amplification effect of image, simultaneously because the first speculum group 100 and the second speculum group 200 are movably arranged on screen and beholder
Eyes between, so allow for the first speculum group 100 and screen 1000, the first speculum group 100 and the second speculum group
200 and second speculum group 200 and the distance between eyes 2000 it is adjustable, it is achieved thereby that the reality to magnified image effect
When adjust, substantially increase user experience.
In order to realize that the activity of the first speculum group 100 and the second speculum group 200 is set, in some embodiments,
Hereinbefore glasses, eyeshade either some moulding such as mask or only by crust bag can be made in magnified image device
During the product wrapped up in, set in glasses, eyeshade either mask or shell anti-for the first speculum group 100 and second
The slideway of the movement of microscope group 200 is penetrated, is the activity that the first speculum group 100 and the second speculum group 200 can be achieved by the slideway
Set., can also be by either some moulding such as mask or only by crust of glasses, eyeshade in other embodiments
The form of retractable is made in the product of parcel, and the first speculum group 100 and second is realized by freely stretching for they
The activity of speculum group 200.
The first speculum group 100, the second speculum group 200 of the magnified image device an of the utility model is set forth below
Cases of design, such as following table：
Table one：Optical component parameter table
Description more than to each embodiment of the utility model, the utility model at least possess following technology
Effect：
1st, possesses magnified image function；
2nd, mixed reality is realized, improves the real experiences effect of user；
3rd, various use groups are applicable in；
4th, overall dimensions can accomplish smaller；
5th, it is simple in structure, cost is low.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or the spy for combining the embodiment or example description
Point is contained at least one embodiment or example of the utility model.In the present specification, to the schematic table of above-mentioned term
State and be necessarily directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be with
Combine in an appropriate manner in any one or more of the embodiments or examples.In addition, without conflicting with each other, this area
Technical staff can by the different embodiments or example described in this specification and different embodiments or exemplary feature into
Row combines and combination.
Although the embodiment of the utility model has been shown and described above, it is to be understood that above-described embodiment is
Exemplary, it is impossible to the limitation to the utility model is interpreted as, those of ordinary skill in the art are in the scope of the utility model
It is interior above-described embodiment to be changed, changed, replaced and modification.
Claims (10)
1. the magnified image device of a kind of mixed reality, it is characterised in that including external camera, left eye microscope group and right eye mirror
Group, the external camera are used for the image for obtaining screen, and the left eye microscope group and the right eye microscope group include：
First speculum group, first speculum group are set along the optical axis of its own, and first speculum group is used to connect
Receive the incident light that image is sent out；
Second speculum group, second speculum group are set along the optical axis of its own, and second speculum group is in described
On the reflected light path of first speculum group, second speculum group is used to receive through the anti-of first speculum group reflection
Penetrate light and carry out secondary reflection, second speculum group by the incident light carry out secondary reflection after with the external camera
The image superposition of the screen of acquisition；
Wherein, first speculum group and second speculum group are along the eyes direction from screen to beholder successively cloth
Put.
2. magnified image device as claimed in claim 1, it is characterised in that the ATR Optical face of second speculum group
Towards the eyes.
3. magnified image device as claimed in claim 2, it is characterised in that the optical axis of second speculum group and described pair
The oculopupillary optical axis of eye is in same plane.
4. magnified image device as claimed in claim 1, it is characterised in that first speculum group and the light of the screen
The extending direction of axis is inconsistent, and first speculum group and the extending direction of the optical axis of second speculum group are inconsistent,
Second speculum group and the extending direction of the oculopupillary optical axis of the eyes are inconsistent.
5. such as claim 1-4 any one of them magnified image devices, it is characterised in that the first reflection group includes multiple
First reflecting optics, second speculum group include multiple second reflecting optics.
6. magnified image device as claimed in claim 5, it is characterised in that the focal power of first speculum group is selected from just
Number, negative or one or more of zero, the focal power of second speculum group is selected from positive number and/or negative.
7. magnified image device as claimed in claim 6, it is characterised in that first speculum group and the described second reflection
The focal power of microscope group meets relational expression：
-0.55<(Φ1+Φ2-(Φ1*Φ2)*d12)<0.55；
Wherein, Φ 1 and Φ 2 is respectively the focal power of first speculum group and second speculum group, and d12 is described the
Equivalent gap between one speculum group and second speculum group.
8. magnified image device as claimed in claim 5, it is characterised in that the surface configuration of first reflecting optics is selected from
Plane, sphere or it is aspherical in one kind, the surface configurations of second reflecting optics selected from sphere or it is aspherical in one kind.
9. magnified image device as claimed in claim 8, it is characterised in that first reflecting optics and the described second reflection
The aspherical surface configuration of eyeglass meets relational expression：
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Wherein, z is eyeglass rise, and c is lens curvature, and k is circular cone coefficient, and y is eyeglass bore, and a1~a8 is aspherical high-order term
Coefficient.
10. magnified image device as claimed in claim 5, it is characterised in that first reflecting optics and described second anti-
Penetrate eyeglass to be made by low dispersion optical material of the abbe number more than 50, first reflecting optics and second speculum
The surface of piece is coated with total reflection film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721007545.0U CN207318822U (en) | 2017-08-11 | 2017-08-11 | A kind of magnified image device of mixed reality |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721007545.0U CN207318822U (en) | 2017-08-11 | 2017-08-11 | A kind of magnified image device of mixed reality |
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| Publication Number | Publication Date |
|---|---|
| CN207318822U true CN207318822U (en) | 2018-05-04 |
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| CN201721007545.0U Expired - Fee Related CN207318822U (en) | 2017-08-11 | 2017-08-11 | A kind of magnified image device of mixed reality |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107255862A (en) * | 2017-08-11 | 2017-10-17 | 深圳市辰羿科技有限公司 | A kind of magnified image device of mixed reality |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107255862A (en) * | 2017-08-11 | 2017-10-17 | 深圳市辰羿科技有限公司 | A kind of magnified image device of mixed reality |
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Granted publication date: 20180504 Termination date: 20190811 |